Number of polyominoes with width and height equal to n that are invariant under all symmetries of the square.

A268339

Number of polyominoes with width and height equal to n that are invariant under all symmetries of the square.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =3a(4) =17a(5) =17a(6) =163a(7) =163a(8) =2753a(9) =2753a(10) =84731a(11) =84731a(12) =4879497a(13) =4879497a(14) =535376723a(15) =535376723a(16) =112921823249a(17) =112921823249

External references